diff --git a/src/evm/executive.rs b/src/evm/executive.rs
index 8547af1a2..1ab7a580d 100644
--- a/src/evm/executive.rs
+++ b/src/evm/executive.rs
@@ -1,3 +1,5 @@
+use util::hash::*;
+use util::uint::*;
 use state::*;
 use env_info::*;
 use engine::*;
@@ -27,9 +29,11 @@ impl<'a> Executive<'a> {
 	pub fn exec(&mut self, transaction: &Transaction) -> ExecutiveResult {
 		// TODO: validate that we have enough funds
 
+		self.state.inc_nonce(&transaction.sender());
+
 		match transaction.kind() {
 			TransactionKind::MessageCall => self.call(transaction),
-			TransactionKind::ContractCreation => self.create(transaction)
+			TransactionKind::ContractCreation => { unimplemented!(); }// self.create(&self.sender(), )
 		}
 	}
 
@@ -37,7 +41,7 @@ impl<'a> Executive<'a> {
 		ExecutiveResult::Ok
 	}
 
-	fn create(&mut self, transaction: &Transaction) -> ExecutiveResult {
+	fn create(&mut self, address: &Address, endowment: &U256, gas_price: &U256, gas: &U256, init: &[u8], origin: &Address) -> ExecutiveResult {
 		ExecutiveResult::Ok
 	}
 }
diff --git a/src/evm/ext.rs b/src/evm/ext.rs
index d46378d66..27fdc1028 100644
--- a/src/evm/ext.rs
+++ b/src/evm/ext.rs
@@ -27,8 +27,8 @@ impl SubState {
 	}
 }
 
-/// This structure represents contract execution environment.
-/// It should be initalized with `State` and contract address.
+/// Externality interface for the Virtual Machine providing access to 
+/// world state.
 /// 
 /// ```markdown
 /// extern crate ethcore_util as util;
@@ -41,7 +41,7 @@ impl SubState {
 /// fn main() {
 /// 	let address = Address::from_str("0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6").unwrap();
 /// 	let mut data = RuntimeData::new();
-/// 	let mut env = Env::new(EnvInfo::new(), State::new_temp(), address);
+/// 	let mut ext = Ext::new(EnvInfo::new(), State::new_temp(), address);
 /// }	
 /// ```
 pub struct Ext {
diff --git a/src/state.rs b/src/state.rs
index dbe349d77..cc8aad7fd 100644
--- a/src/state.rs
+++ b/src/state.rs
@@ -339,4 +339,4 @@ fn create_empty() {
 	assert_eq!(s.root().hex(), "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421");
 }
 
-}
\ No newline at end of file
+}
diff --git a/src/transaction.rs b/src/transaction.rs
index 21282229e..517926b40 100644
--- a/src/transaction.rs
+++ b/src/transaction.rs
@@ -18,7 +18,7 @@ pub struct Transaction {
 	pub gas: U256,
 	pub to: Option<Address>,
 	pub value: U256,
-	pub data: Bytes,
+	pub data: Bytes
 }
 
 impl Transaction {
@@ -33,6 +33,12 @@ impl Transaction {
 		}
 	}
 
+	/// Returns sender of the transaction.
+	/// TODO: implement
+	pub fn sender(&self) -> Address {
+		Address::new()
+	}
+
 	/// Is this transaction meant to create a contract?
 	pub fn is_contract_creation(&self) -> bool {
 		self.kind() == TransactionKind::ContractCreation